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Answers

Q:
I mounted a Burris 3X-12X-32mm scope on my .500 S&W. I used a Weigland mount and 4 Weigland magnum rings. It bore sighted perfectly on the grid, so it should have been close at 50 yards. When I shot it, it was hitting so high that I ran out of adjustment and it was still hitting 7 inches high. I checked to make sure everything was still tight and the scope was still good and bore sighted it again, basically raising it back up to where it was before. Before I go out and try again, does anybody have any ideas as to what could be going on? I did use some "cheaper" ammo that was 75 grains lighter than what I normally shoot, but I can’t imagine it would make that drastic a difference. I would appreciate any thoughts.

from 4everAutumn on 01.05.13

Answers (8)

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from JM wrote 1 year 14 weeks ago

Shim the front mount*

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from JM wrote 1 year 14 weeks ago

Try that heavier load. If they aren't on target you could try shimming the rear mount.

+1 Good Comment? | | Report
from JHP wrote 1 year 14 weeks ago

4everAutum
Just a thought. Can you get someone else to shoot the gun with the scope and see if they get the same results. You might have something going on with the tri focals. just a thought.

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from 4everAutumn wrote 1 year 14 weeks ago

The iron sights work great, it’s just my eyes that don’t. I had to get tri-focal glasses and I can’t shoot with the iron sights any more. I have used it as my deer gun the last 7 years and have had great success with it so I never expected to have trouble when I added the scope. I hunt with Winchester 400 gr PTHP, but the ones that were shooting high are Magtech 325 gr FMC Flat.

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from huntfishtrap wrote 1 year 14 weeks ago

If it bore-sighted well, it's got to be the load, IMO. Try a heavier/slower round, and see what happens.

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from JHP wrote 1 year 14 weeks ago

I agree, use full power/weight loads. Lighter loads tend to shoot high. see how that works. take the scope off and see how the iron sights work. i had a problem with that one time on a new .44mag where the rear sight did not have enough horizontal adjustment and the gun had to be sent back to manuf. I think they put on another barrel.
Another thing to try is reverse the position of rings if possible. Back to front, front to back.
If all else fails you will have to somehow lower the front of the scope or raise the back of the scope.
If the rings or base can not be altered you will have to get some brass shim material and shim the bottom rear of the scope to lower point of impact. Burris makes rings that actually use different thickness inserts to accomplish this. They self align within the ring so they do not damage scope.

+1 Good Comment? | | Report
from DSMbirddog wrote 1 year 14 weeks ago

Use your normal loads and see where you are at with zero. 75 grains is significant at 50 yards.

+1 Good Comment? | | Report
from JM wrote 1 year 14 weeks ago

Rings/scope too high maybe? Are the iron sights dead on @50?

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Post an Answer (200 characters or less)

from JM wrote 1 year 14 weeks ago

Shim the front mount*

+2 Good Comment? | | Report
from JM wrote 1 year 14 weeks ago

Rings/scope too high maybe? Are the iron sights dead on @50?

+1 Good Comment? | | Report
from DSMbirddog wrote 1 year 14 weeks ago

Use your normal loads and see where you are at with zero. 75 grains is significant at 50 yards.

+1 Good Comment? | | Report
from JHP wrote 1 year 14 weeks ago

I agree, use full power/weight loads. Lighter loads tend to shoot high. see how that works. take the scope off and see how the iron sights work. i had a problem with that one time on a new .44mag where the rear sight did not have enough horizontal adjustment and the gun had to be sent back to manuf. I think they put on another barrel.
Another thing to try is reverse the position of rings if possible. Back to front, front to back.
If all else fails you will have to somehow lower the front of the scope or raise the back of the scope.
If the rings or base can not be altered you will have to get some brass shim material and shim the bottom rear of the scope to lower point of impact. Burris makes rings that actually use different thickness inserts to accomplish this. They self align within the ring so they do not damage scope.

+1 Good Comment? | | Report
from huntfishtrap wrote 1 year 14 weeks ago

If it bore-sighted well, it's got to be the load, IMO. Try a heavier/slower round, and see what happens.

+1 Good Comment? | | Report
from 4everAutumn wrote 1 year 14 weeks ago

The iron sights work great, it’s just my eyes that don’t. I had to get tri-focal glasses and I can’t shoot with the iron sights any more. I have used it as my deer gun the last 7 years and have had great success with it so I never expected to have trouble when I added the scope. I hunt with Winchester 400 gr PTHP, but the ones that were shooting high are Magtech 325 gr FMC Flat.

+1 Good Comment? | | Report
from JHP wrote 1 year 14 weeks ago

4everAutum
Just a thought. Can you get someone else to shoot the gun with the scope and see if they get the same results. You might have something going on with the tri focals. just a thought.

+1 Good Comment? | | Report
from JM wrote 1 year 14 weeks ago

Try that heavier load. If they aren't on target you could try shimming the rear mount.

+1 Good Comment? | | Report

Post an Answer (200 characters or less)

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